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Need help on this question from Math theory. Only answer if you are certain it is correct. Thank you! _n(n + 1)(2n+7), 3. Prove that 1.3+2.4+3.5+...+n(n+2) = - for every positive integer n.

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This Mathe matical with help of indvction. frx baxe LH S - ),8- 3. 1. (1-+1)2-1 RHS 3. jも truc fo the bare So Is Now truc Csu

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